Hemoglobin is an oxygen‑transport protein found in the red blood cells of all vertebrates. in mice, hemoglobin is a complex of four subunits, 2 α‑globin chains and 2nd β‑globin chains, with each subunit containing a heme molecule. the mouse β‑globin gene is approximately 1,500 nucleotides long; however, the cytoplasmic β‑globin mrna is only about 750 nucleotides long. what's the best explanations for the difference in length.

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Hemoglobin is an oxygen‑transport protein found in the red blood cells of all vertebrates. In mice, hemoglobin is a complex of four subunits, 2 α‑globin chains and 2nd β‑globin chains, with each subunit containing a heme molecule. The mouse β‑globin gene is approximately 1,500 nucleotides long; however, the cytoplasmic β‑globin mRNA is only about 750 nucleotides long. What's the best explanations for the difference in length.

a. The B globin gene is interrupted by one or more introns.  

b. The beginning of the Bglobin gene is not transcribed  

c. The globin mRNA underwent splicing in the cytoplasm.  

d. The B-globin mRNA is processed after being transcribed.  

e.The B-globin gene encodes both of the B-globin subunits.

a. The B globin gene is interrupted by one or more introns.  

d. The B-globin mRNA is processed after being transcribed.  

Explanation:

Vertebrates are eukaryotes and eukaryotic DNA has introns and exons. The introns are the non-protein coding sequences that are present between the protein-coding exons. However, transcription of eukaryotic genes forms the primary transcripts which in turn undergo post-transcriptional modification to become mature mRNA. It includes the splicing of the introns and ligation of exons.

The mature mRNA serves as a template for protein synthesis. Therefore, the mature mRNA of eukaryotes are shorter than their respective genes. The mouse β globin gene must have one or more introns. However, the removal of introns from the primary transcript after transcription would produce a relatively shorter mRNA. The process of splicing of introns occurs in the nucleus itself.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: